In the current implementation of ACCELERATED_COMPOSITING, LayerSkia's are asked to redraw their contents every time the browser needs to redraw the page. This results in a lot of unnecessary drawing. Contents of these layers should only be redrawn when something changes in the layer and simply composited when its time to redraw the page.
Created attachment 51375 [details] Proposed patch
Comment on attachment 51375 [details] Proposed patch r=me.
Comment on attachment 51375 [details] Proposed patch Clearing flags on attachment: 51375 Committed r56502: <http://trac.webkit.org/changeset/56502>
All reviewed patches have been landed. Closing bug.